Improved pavement



description of the same, refe @Mish tetes @anni vfiirle.

o;-IWrLLIA'Ms` ror -NnW'ronin N. Y

` Letters Patent Nm 75,504, dateuZAM'm'cL 10, 1868.

. IMPnovED PAVEMENT.

To ALLl WHoM rr MAY CoNoEnN:

Be it known thatl, G.,WILI.IAMS, of' the city, county, and State of New York, have invented certain new land useful Improvementsin Ba'vements; and I do hereby declare that thev following is a full, clear, and exact rence being had to the accompanying drawings, making a portion of this specification, in nhichf'- Figure 1 is a plan view of a pavement constructed according to my invention.

Figure 2is an inverted plan of thesame. i

Figure is arve'rtic'al section of the same.

Similar letters of reference indicate corresponding parts in all the g'ures.

Thisv invention consists in a pavementlformed of wooden blocks constructed withdeep vertical grooves filled with suitable cement, vvhcreby a pavement possessing the several advantages of affording a-s'uperior foothold to animals traversing thesamc, and of being extremely solid and durable, is secured, v

The invention further consists in the combination, with .the wooden blocks, of sub-sills of novel construetion, whereby the blocks are firmly supported inl their places, and whereby a portion ofl the pavement may be conveniently taken up, as required, for instance, in repairing sewers or gas or water-mains placed underneath the Same.

The invention:further'conssts in a novel means of locking the blocks together, whereby the security with which they are `re'tained'in proper position with reference to each other is materially increased. f

To enable others to understand the nature and construction of my invention, I will proceed to describe it with reference to the drawings.' i

A represents rectangular blocks, which may be of any suitable wood, and which are placed with the grain Vof the wood in a vertical position. These blocks are eonstruetedwith deep vertical grooves, a, running at rightan'gles to each other, as shown in g.`1, the said grooves being filled with a hard cement, as indicated at b, made 'oi any suitable material, but formed preferably of coal-tar and gravel, orsand,'or of other like substances,

which will not only be of suiiicient hardness to resist in a great measure the wear of travel upon it, and prevent the chipping oi dr breaking 4down of the sides of the` grooves, but will also exert an antiseptic eiect upon the Wood;

Each o'f the'blocks A is provided at each of its lateral edges'with'a narrow rebate, e, of a depth equal to that of the grooves a', in such manner that when the blocks are placed side'by side, as shown in the drawings, the aforesaid rebates beingbrou'ghttogether will form grooves, as shown at' ait, Whichvcorrespondto thefgrooves a, formed wholly within the several blocks, as just hereinbefore fully set forth.

Formed horizontally rin the sides or lateral edges of the blocks A, and in communication .with the rebates therein just mentioned, are dove-tail grooves c, so arranged that the grooves ai, being filled with cement in the same manner as the grooves a,the saiddove-tail grooves will also be filled thercwitlnso that such cement after having hardened will firmly lockv the several blocks together, not only tending to prevent the lateral separation of the same, but also, to' a certain extent, supporting them against vertical depression.

The same result may be'obtaincd in an equaldegree by driving keys of suitable double dove-tailed shape into the two opposite dove-tail grooves, and thus locking the block-s together. Such prevention of downward displacement of the blocks-is, however, for the most part, secured by sub-sills B, which are made in rectangular sections or separate pieces of any suitable wood or material, of supereial area and formation corresponding with or they may be smaller than the paving-blocks A, and .of any desired thickness, 'thesesub-sills being so placed that the central part of each ivill support the fouradjaeent corners, above it, of the blocks A, as shown in figs. 2 and 8.

T he blocks being thus rmly supported and held in place, constitute a veryfirm and durable pavement, a good foothold being afforded to draught or other animals traversing the same, by the depressions formed by the upper portions of the grooves@ ai, at the same time that the antiseptic nature of the cement or material with which the said grooves are filled prevents the premature deca-y of the blocks. Furthermore, the grooves a* beingmado jeter-tight by the cement placed therein, the passage or-iiitration of Water through the pavement is eiectually prevented.

Furthermore, inasmuch as it is necessary to support th An additional advantage resulting from this Aconstruction of pavement isthat any small portion thereof` may be readily taken up when required to enable sewers orgas or other pipes underneath the sumo-to be reached. e blocks A. only at their corners, the sectional sub-sills ed, be made of much less area than the aforesaid blocks, instead of forming a continuous substructure.

What I claim as my invention, and desire to secure by Letters Patent, is- The construction and arrangement (in a wooden pavement) ol` the blocks A A, in such a manner that double dove-tailed grooves shall be formed between said blocks, so that when the same are illed with cement, as herein described, such filling will operate as a tie to said blocks, 'substantially as herein set forth.

C. WILLIAMS.

may, if desir Witnesses:

J. W. Coonnss, G. W. REED. 

